Platen press



E. GROSSE PLATEN PRESS AprilY 15 Patented Apr. 15, 1924.

EIDUARD GEOSSE, OF WACHWITZ, NEAIR. DBBSD'EN, GERMANY.

PLATEN PRESS.

Application filed November 27, 1922. Serial No. 603,717.

I 10 aZZ wlzom it may concern:

Be it known that I, EDUARD Gnossn, a citizen of Germany, residing at Wachwitz, near Dresden, Grundstrassc 8, Germany, have invented certain new and useful Improvements in Platen Presses, of which the following is a specification.

The present invention relates to inking and sheet delivery devices which, by means of the same conveying medium, are together' guided around the middle part of the platen press servng as type bed. The novelty of the present invention consists in driving the inking rollers and delivery device by means of wheels attached to the middle part of the press With connecting rods at right angles. The new movers for the grippers taking the sheet-s off the platen and conveying themto the table are curves of a peculiar shape which cause the rotation of the grippers.

The advantages of the newly invented conveying and moving medium are clearly set forth in the following specifications. The superiority of the wheels attached to the middle part of the press with connecting rods at right angles lies in their considerably Simplified construction, while the curves causing the motion of the grippers are distinguished by great safety in operation which is maintained even during highest speed, owing to the positive guiding of the grippers.

One form of the invention is illustrated in the drawings in which Fig. 1 is a platen press with curved guide of gripper running around the connecting link and with toothed wheel attached to the middle part with connecting rods at right angles shown from the side, and Fig. 2 is a sectional view vof the hearing of the toothed Wheel and connecting rods seen from the top.r

The common driver for inking roller andgripper carrier is in this case a toothedwheel which catches and carries along the connecting rods and isy pivoted to the hublike side part of the middle body of the press which has been Shaped to form points of support for it. i

The new features in this construction are not only the guiding of the gripper carriers but also the guiding of theinking rollers. In the older types of platen presses of this kind the inking rollers are conveyed 'by means of roller supports fastened to the 'crank shaft of the machine and turning with lt: The inking rollers are directly placed in slit bearings of the roller supports or are arranged in movable bearings and travel without further guidance exclusively in runner rails. This demands the arrangement of two roller supports each of which is fastened to one side of the machine on the crank shaft. As both roller supports circle with the crank shaft around the middle part of the press and require a free passage between the latter and the outer frame, they completely separate the middle part from the outer frame and the middle part can only be suspended from the crank shaft in the outer frame. lA middle part suspended in this manner from the c-rank shaft naturally offers not suflicient resistance for the pressure of the platen.

These drawbacks have been overcome by the present invention in the most simple manner by placing the inking rollers not directly in the roller supports but in special roller carriages which are guided by means of rolls in deep grooves running around the middle part and which are moved by special connecting rods. The rigidly connected roller carrages travel with the inking rollers easily in the grooves around the middle part and the only purpose of the 'connecting rods is to push or pull the carriage.

The connecting rods are not like the roller supports directly fastened to the crank shaft of the machine but are rotatably attached to the side ends, connected with the outer frame, of the middle part servi'ng as crank shaft hearing; attached with them is a toothed wheel which facilitates the Circular motion. For this purpose the ends of the crank shaft hearing are Shaped as round hubs which in turn serveas points of support for the toothed wheel with connecting rod attached to them. As this arrangement places the toothed wheel with the connecting rod in the middle part of the press,'the latter does not form an obstacle for rotation and the connecting rods with. the roller carriage attached can be guided completely around the middle part connected with the outer frame without meeting any resistance.

The plaoing of the inking rollers in independent roller carriages forming an integral whole permits the moving of the roller carriages by means of only one connecting rod iio which requires only a one-sided drive. This connecting rod with toothed wheel is placed on the hub-like end of the middle part towards the driving side of the machine and the connecting rod is formed in such a way that it extends'at right angles across the cross side of the machine. To this part of the connecting rod which is parallel to the inking rollers the roller carriage can be attached either by means of slit bearings or flexible rods to both sides or connection can be made amidst the width of the roller carriage which requires as connecting part on both sides of the roller carriage a con necting rod. 'The gripper carriage can be connected with the inking roller carriage by means of rods or pulled by a 'special connecting rod.

' The above arri-ingement, providing for only one connecting rod on the driving side of the machine, simplifies considerably theJ whole construction as only a one-sided drive is needed. It furthermore has the added advantage which is very important that the middle part can be rigidly connected to the side frame in a manner permitting resistance. As the connecting rod is arranged at one side .of the machine only, there is only on this side free passage for the travel of .the connecting rod required. On the other side is no free passage needed and the middle part can on that side be fastened to the side frame with its full surface whereby a good and substantial connection can be established.

As shown in Figs. 1 and 2 G is the machine frame and B the middle body of the press on both sides of which the walls y have been provided. These contain one milled groove h each in which the roller carriage VV is guided by means of rolls g. The walls y have the form of circles which are flatted on the side opposite the platen T. Z is the main shaft in the machine frame. The groove h, corresponding to the shape of the walls y, forms a circle measured from the centre of the main shaft Z and this circle shows a flattening at the point where the Vform D is located. so

The inling roller carriage VV is guided in this groove IL by means of connecting rod c and a gearing and moves in this groove on rolls.

The connecting rods c, as described below, rotate around a hub-like widening B' of the centre body Bl and describe with their outer ends, as seen from the centre of the shaft Z, a circle and guide the roller carriage TV with the inking rollers f in a uniform distance to the form D where the lbeen f provided Vwith the slit guide c' in which the roller carriage guided therein can move up and down and also towards the inside.

The circuit travelled by the connecting rods c at each impression made by the machine requires a free track, unimpeded by any machine parts, while the middle part B around which the connecting rods move must be firinly connected with the outer frame G. If the connecting rods were directly placed on the crank shaft Z, it Would not be possible to connect the middle part B firmly to the outer frame G, because in that case the middle part would be suspended from the crank shaft Z passing through it and be turning about the latter without any firm hold.

This difficulty has been removed by placing the connecting rods e not directly on the crank shaft Z but indirectly together with a driving toothed wheel on a hub-like enlargement B' of the middle part B.

The middle part B consists of a type bed to 'one side of which the form D is attached while the other side forms the hearing for the Crank shaft Z. The crank shaft Z runs through the whole machine vfrom one side to the other, through the middle art B as well as through the outer frame (Figs. 1 and 2). a toothed wheel aV has been provided to which, by means of Crank plates and cranks K, are linked the conne'cting rods which move the platen T. The pressure of the platen is chiefly borne by the middle part B, and the side walls G serve only as support for the lat-ter. The middle partmust therefore be exceptiona-lly strong as it is intended to stand the pressure weighing down upon the crank shaft Z and prevent any bending of the shaft. For this purpose the crank shaft Z is strongly placed in side and middle bearings. The side bearings eXtend to the toothed wheel a and the crank plate and project through the walls of the frame G (Fig. 2).

To permit free passage of the connecting rods around the middle part of the press a toothed wheel c has been put on the round crank shaft hearing B' of the middle part, and this toothed wheel turns on the bearings B' as on a shaft. The crank shaft hearing B' has here again been formed as a hub-like shaft for the toothed wheel c on it. Figs. 1 and 2 give a sectional view of this arrangement. The crank shaft Z rests rotatably in the hub-like end parts B' of the middle part B. Part B' is round Shaped and serves as hearing for the toothed wheel c on top of it and the connecting rod e. .The extreme end of the middle part B' has the shape of a jack B2 which is firmly screwed together with the frame G. The middle part B is thus at its extreme part B2 firmly attached to the frame while the toothed wheel c with On each side of the crank shaft Z.

lll

lll

Madeos connecting rod e revolvesl independently from the Crank shaft. To enable the toothed wheel c to be placed on .the hub B' it is made in two sections. These two halves are put on the hub Bi and then screwed together.

The Crank shaft is driven by the toothed wheel a (Fig. 2) keyed on to it which in turn is driven by the driving Wheel b on the shaft of the fiywheel S. The flywheel shaft extends through the Wall of the frame G and carries at its end the driving wheel d Which turns the large toothed wheel c attached to the middle part hub B' (Figs. 1 and 2). Instead of the toothed wheels c and d other driving means of equal value may be used, as for instance chain Wheels. etc.

To the toothed wheel c have been fastened the conne'cting rods e which guide the inking roller Carrie-ge W around the middle part. The driving wheels b, d and the toothed wheels a, c are equally large each and their revolution is therefore equal. In the same time in which the toothed wheel a by means of cranks K moves the platen T once to and fro, the co-nneetin rods e attached to toothed wheel c gui e the roller carriages once around the -middle part of the Dress.

This arrangement can be provided for both sides of the machine. But as it would require a double driving action in regard to the wheels d c, it is advisable to attach the Wheel drive to one side only and to Crank the connecting rod e in such a manner that it extends at right angles across the middle part and can guide with its second end 62 (Fig. 2) the other parts of the carriage running in member y.

Drive by means of a Connecting rod offers the possibility for a more roomy fastening of the middle part to the side opposite the wheel drive c al, as there is no drive v' on that side and no free space required for the passage of the connecting rods.

The gripper Carriages A are guided by a Cranked conneoting rod like the inking roller Carriages VV. The mode of action is the same as for the drive of the roller carriages.

The rotatory motion of the grppers m is caused by the runner lever p whose roll p' runs in groove q; s is a toothed gearing receiving its motion from the lever p'. The

runner lever p runs yWith its runner in a platen presses with inking rollers, inking roller Carriers, sheet delivery devices and gripper Carriers Whlch are guided around the middle part of the press by means of a toothed gearing, situated in the center of the press, and by means of connecting reds.

2. Inking and sheet delivery devices in platen presses in Which the inking rollers are placed in a separate carriage actuated by a gearing whose one Wheel guiding the inking roller carriage by means of a connecting rod is plaoed on the hub-like side part of the middle part of the press.

3. Inking and sheet delivery v device in platen presses in which'the Connecting rod guiding the inking roller Carriage is provided With an arm linked on at'right angles which extends over the whole width of the machine and, with yits other end, serves as guide for the inking roller carriage.

4. Inking and sheet delivery devices in platen presses with gripper carriers, gripping device and connecting rods which are guided by a wheel positioned in a rotating manner on the hub-like side part of the middle part of the press and guide the gripper Carrier around the said middle part.

5. Inking and sheet delivery device in platen presses with gripper carriers, gripper shafts and lever arms attached to both sides of the gripper shaft and-Carrying rolls whichrun in curves; and furthermore 'grippers Which, while the gripper Carriage is passing around the middle part of the press, pick up the printed sheet, turn it and guide it to a delivery table.

In testimony whereof I have aiixed my signature in presence of two witnesses.

R. A. OLIvEn, Amare WrrTnNBUne.

lOO 

